SCHARTEC Double Door Lock SDL3 with Alarm 120 dB Patio Security Combination French Doors

Integrated 120 dB alarm: When armed, any significant vibration or attempted break-in triggers a 120 dB alarm for 30 seconds. If further vibrations occur, the alarm cycle repeats until deactivated. 30-second arming delay: After activating the alarm, you have 30 seconds to close the door and secure the lock without triggering the alarm – even if the lock is moved during this period. Instant clip-on locking: The two-part clip mechanism locks securely over both door handles in a single movement. To open it, simply operate the black slider and pull the two sections apart. No tools, no drilling: Can be fitted and removed in seconds without making any permanent changes to the door. Ideal for tenants, holiday lets and temporary use. Wide handle compatibility: Suitable for horizontal door handles with a spacing of 6.5 cm to 18 cm – compatible with most standard patio and balcony doors. Robust aluminium and ABS construction: Lightweight yet sturdy – resistant to impact, corrosion and wear for reliable everyday use. Dual deterrent – visual and audible: The highly visible white bar acts as an immediate visual deterrent, while the alarm adds a second, effective layer of protection that a purely mechanical lock cannot provide on its own. For indoor use only: Designed to be fitted on the inside of the door, adding both physical and audible protection to the existing door lock. Original SCHARTEC-Quality you can trust: 5 Year Mechanical Guarantee